Pub Date : 2003-03-10DOI: 10.1002/POL.1966.110041011
Icksam Noh, Hyuk Yu
It is well known that the coloration and structural changes in thermal treatment of polyacrylonitrile are due to the formation of partly hydrogenated naphthylidine-type ring involving the pendant nitrile groups. Any quantitative study of the reaction, in the sense of kinetics and/or statistics, however, has never been reported. This paper presents that, at first, the disappearance of the nitrile groups follows the first order kinetics, which indicates clearly that nitrile groups do not disappear by a long chain reaction-the kinetic chain length is very short. This observation rules out the long intramolecular and intermolecular propagation chain through which most of the nitrile groups disappear. From the evidence that a similar reaction occurs in propylene carbonate solutions without gel formation, one may conclude that the coloration and structural changes are not necessarily intermolecular reaction. Secondly, a finite amount of nitrile groups remains unreacted at the extrem of reaction-not contributed to the formation of naphthylidine-type ring. The concentration of this unreacted nitrile groups is 19∼22% which is good agreement with the statistically calculated value of 19.2%
{"title":"Kinetics and statistics of structural changes in polyacrylonitrile","authors":"Icksam Noh, Hyuk Yu","doi":"10.1002/POL.1966.110041011","DOIUrl":"https://doi.org/10.1002/POL.1966.110041011","url":null,"abstract":"It is well known that the coloration and structural changes in thermal treatment of polyacrylonitrile are due to the formation of partly hydrogenated naphthylidine-type ring involving the pendant nitrile groups. Any quantitative study of the reaction, in the sense of kinetics and/or statistics, however, has never been reported. This paper presents that, at first, the disappearance of the nitrile groups follows the first order kinetics, which indicates clearly that nitrile groups do not disappear by a long chain reaction-the kinetic chain length is very short. This observation rules out the long intramolecular and intermolecular propagation chain through which most of the nitrile groups disappear. From the evidence that a similar reaction occurs in propylene carbonate solutions without gel formation, one may conclude that the coloration and structural changes are not necessarily intermolecular reaction. Secondly, a finite amount of nitrile groups remains unreacted at the extrem of reaction-not contributed to the formation of naphthylidine-type ring. The concentration of this unreacted nitrile groups is 19∼22% which is good agreement with the statistically calculated value of 19.2%","PeriodicalId":16854,"journal":{"name":"Journal of Polymer Science Part B: Polymer Letters","volume":"14 1","pages":"721-726"},"PeriodicalIF":0.0,"publicationDate":"2003-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78795585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-12-01DOI: 10.1002/POL.1972.110101208
H. Kamogawa
{"title":"Preparation of polyene polymer containing carotene derivative as polyene unit","authors":"H. Kamogawa","doi":"10.1002/POL.1972.110101208","DOIUrl":"https://doi.org/10.1002/POL.1972.110101208","url":null,"abstract":"","PeriodicalId":16854,"journal":{"name":"Journal of Polymer Science Part B: Polymer Letters","volume":"22 1","pages":"929-933"},"PeriodicalIF":0.0,"publicationDate":"1972-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86312931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-11-01DOI: 10.1002/pol.1972.110101112
J. Bikerman
{"title":"Gas chromatography in polymer chemistry (in Russian), V. G. Berezkin, V. R. Alishoev, and I. B. Nemirovskaya, “Nauka”, Moscow, 1972. 288 pp. Rub. 1.13","authors":"J. Bikerman","doi":"10.1002/pol.1972.110101112","DOIUrl":"https://doi.org/10.1002/pol.1972.110101112","url":null,"abstract":"","PeriodicalId":16854,"journal":{"name":"Journal of Polymer Science Part B: Polymer Letters","volume":"1 1","pages":"883-883"},"PeriodicalIF":0.0,"publicationDate":"1972-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83555350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-11-01DOI: 10.1002/pol.1972.110101115
N. Bikales
{"title":"Plastics as design form, Thelma R. Newman, Chilton Book Company, Philadelphia, Pennsylvania, 1972. 348 pp. $17.95","authors":"N. Bikales","doi":"10.1002/pol.1972.110101115","DOIUrl":"https://doi.org/10.1002/pol.1972.110101115","url":null,"abstract":"","PeriodicalId":16854,"journal":{"name":"Journal of Polymer Science Part B: Polymer Letters","volume":"1 1","pages":"886-886"},"PeriodicalIF":0.0,"publicationDate":"1972-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75614745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-11-01DOI: 10.1002/POL.1972.110101103
Takakazu Yamamoto, A. Yamamoto, S. Ikeda
{"title":"On the opening of double bond in the polymerization of methyl methacrylate initiated by diethylbis (dipyridyl) iron","authors":"Takakazu Yamamoto, A. Yamamoto, S. Ikeda","doi":"10.1002/POL.1972.110101103","DOIUrl":"https://doi.org/10.1002/POL.1972.110101103","url":null,"abstract":"","PeriodicalId":16854,"journal":{"name":"Journal of Polymer Science Part B: Polymer Letters","volume":"10 1","pages":"835-838"},"PeriodicalIF":0.0,"publicationDate":"1972-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90109307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-10-01DOI: 10.1002/POL.1972.110101001
N. Gaylord, B. K. Patnaik, S. Maiti
{"title":"“Cationic” polymerization in presence of polar solvents and acrylic monomers","authors":"N. Gaylord, B. K. Patnaik, S. Maiti","doi":"10.1002/POL.1972.110101001","DOIUrl":"https://doi.org/10.1002/POL.1972.110101001","url":null,"abstract":"","PeriodicalId":16854,"journal":{"name":"Journal of Polymer Science Part B: Polymer Letters","volume":"33 1","pages":"751-758"},"PeriodicalIF":0.0,"publicationDate":"1972-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74263214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-10-01DOI: 10.1002/POL.1972.110101003
A. Burmester, P. Dreyfuss, P. Geil, A. Keller
{"title":"On the annealing of polyamide crystal mats","authors":"A. Burmester, P. Dreyfuss, P. Geil, A. Keller","doi":"10.1002/POL.1972.110101003","DOIUrl":"https://doi.org/10.1002/POL.1972.110101003","url":null,"abstract":"","PeriodicalId":16854,"journal":{"name":"Journal of Polymer Science Part B: Polymer Letters","volume":"9 1","pages":"769-775"},"PeriodicalIF":0.0,"publicationDate":"1972-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74345459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-10-01DOI: 10.1002/POL.1972.110101007
T. L. Ang, R. Chang, E. Santee, H. Harwood
{"title":"Synthesis of alternating 1,1,4,4-tetradeuterio-butadiene-methacrylonitrile copolymers and their characterization by 300 MHz NMR spectroscopy","authors":"T. L. Ang, R. Chang, E. Santee, H. Harwood","doi":"10.1002/POL.1972.110101007","DOIUrl":"https://doi.org/10.1002/POL.1972.110101007","url":null,"abstract":"","PeriodicalId":16854,"journal":{"name":"Journal of Polymer Science Part B: Polymer Letters","volume":"43 1","pages":"791-797"},"PeriodicalIF":0.0,"publicationDate":"1972-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75505857","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-10-01DOI: 10.1002/POL.1972.110101006
G. Pistoia
{"title":"Electroinitiated polymerization of styrene in propylene carbonate","authors":"G. Pistoia","doi":"10.1002/POL.1972.110101006","DOIUrl":"https://doi.org/10.1002/POL.1972.110101006","url":null,"abstract":"","PeriodicalId":16854,"journal":{"name":"Journal of Polymer Science Part B: Polymer Letters","volume":"9 1","pages":"787-790"},"PeriodicalIF":0.0,"publicationDate":"1972-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86696485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1972-10-01DOI: 10.1002/POL.1972.130101012
A. Schindler
{"title":"Metallorganische Verbindungen Li Na K Rb Cs Cu Ag Au, O. Bayer, H. Meerwein and K. Ziegler, Georg Thieme Verlag, Stuttgart, West Germany, 1970. 904 pp. DM 336","authors":"A. Schindler","doi":"10.1002/POL.1972.130101012","DOIUrl":"https://doi.org/10.1002/POL.1972.130101012","url":null,"abstract":"","PeriodicalId":16854,"journal":{"name":"Journal of Polymer Science Part B: Polymer Letters","volume":"1219 1","pages":"818-819"},"PeriodicalIF":0.0,"publicationDate":"1972-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82624532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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